+1I even like Sunsun. I've had my Sunsun 302 going for 3yrs, no problems. For HOBs, I'd use nothing but AC. A pair of AC110s and a canister would be great on your 125g.
If money is a factor, I'd highly recommend Sunsun canisters. For a 125gal, I'd go with two 304B. This model is big and can hold a ton of bio media. The best part is that 2 of these units with cost you less than $180 shipped. Between a friend and I, we have 6 of these units going on 3 years....no issues.